[shayief]

Gitpatch attempts to solve this. Supports versioned patches and patch stacks (aka stacked PRs). Also handles force-pushes in stacks correctly even without Change-IDs using heuristics based on title, author date etc. It should also be unusually fast. Disclosure: I'm the author.

I'm not convinced that review comments as commits make thing easier, but I think storing them in git in some way is a good idea (i.e. git annotations or in commit messages after merge etc)